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Organic Molecular Materials Lab
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The lab uses experiments and calculations to clarify how light-emitting organic molecules work and how charge flows in thin films.
AboutAbout the lab
Designing organic EL materials from the molecule up.
The Organic Molecular Materials Lab (Kaji Lab) develops light-emitting materials for organic EL and organic semiconductor materials.
The lab is also developing methods for investigating how materials work, such as analyzing molecular orientation in organic thin films by solid-state NMR and analyzing charge transport in organic thin films by multiscale calculations.
Key terms
- Organic EL
- A phenomenon in which organic molecules emit light when electricity passes through them; also the display or lighting devices that use it
- Solid-state NMR
- A method that measures the magnetic properties of atomic nuclei in solids to investigate molecular structure and arrangement
- Reverse intersystem crossing
- The transition of a molecule from a non-emissive state to a state that can emit light
NewsLab news
A student received the Poster Prize (Bronze Prize) at The 16th Asian Conference on Organic Electronics
A student received the Materials Advances Award at the 14th International Conference on Electroluminescence and Optoelectronic Devices
A student received the ICEL Award at the 14th International Conference on Electroluminescence and Optoelectronic Devices
ResearchResearch themes
The lab designs and develops organic EL materials, and analyzes the structure and charge transport of organic materials using solid-state NMR and calculations.
*Illustrative imageHighly efficient organic EL materials
The lab has succeeded in improving the performance of organic EL materials that convert electricity into light without waste, and in developing high-efficiency blue light-emitting devices. It has also succeeded in designing and developing organic EL emitters that show the world's fastest reverse intersystem crossing.
*Illustrative imageSeeing structure with dynamic nuclear polarization NMR
Using dynamic nuclear polarization NMR, the lab succeeded in performing solid-state NMR measurements and analyzing molecular orientation in very small amounts of amorphous organic thin films. It was also the first in the world to analyze the fine structure of carbon material surfaces.
*Illustrative imageAnalyzing charge flow by calculation
The lab analyzes charge transport in amorphous organic thin films with multiscale calculations. This greatly improved the prediction of charge mobility, and showed that molecular orbitals other than the HOMO/LUMO are also involved in charge transport.
*Illustrative imageCarbon nanorings
The lab succeeded in synthesizing carbon nanorings in large quantities and in fabricating organic devices using them.
MembersFaculty
- ProfessorHironori Kaji
- Associate ProfessorKatsuaki Suzuki
- Assistant ProfessorCHOI Heekyoung
- Assistant ProfessorKurando Ishihara
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Close UP photo of lg c1 oled” TECH EDU / CC BY-SA 4.0 (cropped)
- Highly efficient organic EL materials: “Pt-Based Greenish-Blue PHOLED material” SaiteYuan / CC BY-SA 4.0 (cropped)
- Seeing structure with dynamic nuclear polarization NMR: “Gyrotron plateforme” Rama / CC BY-SA 2.5 (cropped)
- Analyzing charge flow by calculation: “Dinaphthylene-dioxide-3D-balls” Jynto and Ben Mills / Public domain (cropped)
- Carbon nanorings: “Cycloparaphenylene-3D-spacefill” Jynto (talk) / CC0 (cropped)
- Related lab (Quantum Materials Science Lab): “Diamond cuboctahedron” Ludvig14 / CC BY-SA 3.0 (cropped)
- Related lab (Functional Chemistry Lab): “Molekülbaukasten 1 1 1 propellane 8232” Bin im Garten / CC BY-SA 3.0 (cropped)
- Related lab (Transition Metal Complex Chemistry Lab): “- grapes on the vine - 3 strands dangling side by side - (HiRes focus stack)” Franz van Duns / CC BY-SA 4.0 (cropped)
- Related lab (Organic Functional Chemistry Lab): “Sublsublimated azulene” NickItch / CC BY-SA 4.0 (cropped)
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